Chronology of Coverage

Jul. 31, 2015

Editorial assesses first installment of Hillary Rodham Clinton's policy proposals for addressing climate change, focusing on expansion of renewable energy sources for nation's electricity; notes Clinton has not backed idea of carbon emissions tax, which would be effective way of steering country toward renewable energy. MORE

Jul. 29, 2015

Final version of Pres Obama's climate change policy is expected to extend earlier timeline for states and electric utilities to comply; if enacted, plan could stand as most significant action ever taken by American president to curb global warming. MORE

Jul. 28, 2015

Hillary Rodham Clinton turns her attention to renewable energy and sets goal for United States to produce 33% of its electricity from renewable sources by 2027; campaign strategists see global warming as winning issue; proposal seems designed to conform with environmentalist billionaire Tom Steyer's call for candidates to offer policies that promote production of half of nation's electricity from clean sources by 2030. MORE

Jul. 22, 2015

About 60 mayors from around the world gathered at Vatican City for conference on fighting modern slavery pledge to join Pope Francis in combating global warming, which Francis sees as inextricably linked with social issues; event represents first time Vatican has invited local officials to talks on climate change, in hopes of mobilizing grassroots action. MORE

Jul. 22, 2015

New York City Mayor Bill de Blasio attends climate change conference at Vatican; praises Pope Francis for expressing urgency on environmental concerns and for resisting corporate interests. MORE

Jul. 22, 2015

Eduardo Porter Economic Scene column warns that clean energy progress is falling short of necessary levels to combat global warming; cites latest dismal report from the International Energy Agency. MORE

Jul. 21, 2015

New York State Board of Regents approves five-year provisional charter for museum in New York City that would focus on climate and climate change. MORE

Jul. 17, 2015

United States, Norway, Canada, Denmark and Russia pledge to prohibit commercial fishing in international waters of Arctic Ocean until further research is conducted on how rising sea temperatures are affecting fish stocks. MORE

Jul. 17, 2015

Study published in journal Science by Dr John P Whiteman finds no evidence that polar bears enter form of walking hibernation; researchers find no sharp drops in body temperature, which would signal decrease in need for food in summer; findings add to concerns about future of polar bears, given that hibernation state would be potential defense against scarcity of food on land lengthier summer seasons as climate change accelerates. MORE

Jul. 14, 2015

Obama administration report lists examples of increasing impact of climate change on human health, and predicts that global warming will contribute to rise in host of medical conditions ranging from allergies to asthma and even heat-related deaths; many scientists, however, while agreeing that warmer weather is affecting health, contend that direct correlation with climate change is not certain, and that it is only one part of extremely complex set of interacting forces. MORE

Jul. 12, 2015

Pope Francis, during trip to Latin America, returns to his past critiques of capitalism, which he argues is one root of global injustice and primary cause of global warming; in several fiery speeches, appears to be calling for left-wing social revolution. MORE

Jul. 10, 2015

Study in journal Science proposes warming temperatures as reason bees are shrinking away from southern limits of their North American and European ranges; research tracked bumblebee travels and observed range shrinkage from southern border by as much as 190 miles since 1970s; results may explain declining bumblebee species, but critics say study does not make strong case climate change is main cause. MORE

Jul. 6, 2015

Experts say Bureau of Reclamation, federal agency that operates vast network of dams, reservoirs and aqueducts across Western United States, must completely rebuild infrastructure to conserve and distribute water on increasingly warming planet; system, built in 1902 under Pres Theodore Roosevelt, worked well for most of 20th century but is not equipped to handle modern strains (Series: The Parched West). MORE

Jul. 4, 2015

Timothy Egan Op-Ed column warns Seattle's unusually sunny, warm early summer provides scary peek at what Pacific Northwest may look like in climate change future; asserts that while some appreciate extra sunshine, continual warming is likely to cause wildfires and harm salmon populations; calls for people to disregard denials of Sen James Inhofe and take action to stem global warming. MORE

Jul. 1, 2015

China, United States and Brazil report significant progress on environmental initiatives, positive sign as nations prepare for global summit meeting aimed at establishing agreement to cut greenhouse gas emissions; scientists say that efforts will still not be sufficient to stave off atmospheric temperature increase of 2 degrees Celsisus, level widely seen as tipping point for extreme storms, drought, resource shortages and rising sea levels. MORE

Jul. 1, 2015

Eduardo Porter Economic Scene column observes that Republican opposition to 'cap and trade' policy for reducing greenhouse gas emissions has backfired, redirecting nation to standards-based policy that is far more expensive and inefficient; argues that opposition is at odds with conservative belief in free market, and history of similar successful efforts; argues that powerful incentive must be put in place to reduce fossil fuel use, but that it must also be politically tenable. MORE

Jun. 30, 2015

Dr Mikhail Matz study in journal Science finds transporting coral from warmer latitudes to cooler latitudes where same species of coral live may help fragile reefs survive global warming. MORE

Jun. 29, 2015

Members of environmental and religious organizations march to Pope Francis' weekly Sunday address in St Peter's Square to thank him for his encyclical, strongly worded address on climate change; many hope encyclical will influence world leaders to reach binding comprehensive global accord on greenhouse gas emissions at December 2015 United Nations summit meeting on climate change. MORE

Jun. 25, 2015

Hague District Court in Netherlands orders Dutch government to reduce greenhouse gas emissions by at least 25 percent from 1990 levels in next five years as result of groundbreaking lawsuit brought by environmental group Urgenda; decision, citing work of scientific bodies and human rights law, is expected to spur more lawsuits by organizations focused on mitigating and preventing climate change against other governments. MORE

Jun. 23, 2015

White House and Environmental Protection Agency issue report warning that United States could face up to $180 billion in economic losses because of drought and water shortages caused by global warming. MORE

Jun. 22, 2015

Few priests or bishops around world use Sunday sermons to address issue of global warming following release of Pope Francis' encyclical on subject; many clergy members have expressed support for Francis's message, but it remains to be seen whether they will pass message on to their congregations. MORE

Jun. 21, 2015

Encyclical issued by Pope Francis punctuates growing conviction among religious people worldwide that environmental and humanitarian issues represent single, morally urgent problem; shift in thinking has been decades in making, and extends across religious spectrum, with many groups finding scriptural basis for their concerns about global warming and other environmental issues; could lead to historic dialogue between religion and science. MORE

Jun. 21, 2015

Ross Douthat Op-Ed column suggests that controlling theme of Pope Francis's new encyclical is that world is on path toward catastrophe; cautions against reading encyclical in way that makes it solely about climate change. MORE

Jun. 20, 2015

Op-Ed article by Prof Joseph Heath criticizes Pope Francis' objection to economic measures and carbon trading as means of combating global warming; notes Francis' call for moral response to environmental degradation, and holds economic measures are moral in that they place burden of resource abuse on those most guilty of it; contends Francis' version of morality, in keeping with his Catholic faith, is too narrow. MORE

Jun. 20, 2015

Environmental Protection Agency and Transportation Dept unveil new rules that set strict fuel efficiency standards for large trucking rigs used in transportation of goods; rules, along with others that will address smaller trucks, are latest that aim to reduce planet-warming carbon pollution. MORE

Jun. 19, 2015

Pope Francis sets off uproar over his document on environment and peril of climate change, with industrialists, politicians and critics once again saying he should stick with religion and not make fuss in areas where he lacks competence; Francis is following in footsteps of popes and bishops who have penned documents on social problems by applying religious teaching to current events. MORE

Jun. 19, 2015

Pope Francis releases his encyclical on the environment, in which he blames reckless pursuit of profits, excessive faith in technology and political shortsightedness for environmental degradation and climate change. MORE

Jun. 19, 2015

Environmental scientists agree with Pope Francis' encyclical on the environment, in which he says humans are causing potentially catastrophic climate change via greenhouse gas emissions. MORE

Jun. 19, 2015

Pope Francis' encyclical on the environment calls for swift action to curb burning of fossil guels and also condemns carbon trading, policy most widely adopted by governments to combat climate change. MORE

Jun. 19, 2015

Pope Francis' encyclical on the environment is likely to further push big institutions to sell holdings tied to fossil-fuel stocks, blessing for divestment activists. MORE

Jun. 19, 2015

Editorial applauds encyclical on global warming, titled Laudato Si, issued by Pope Francis; expresses hope that statement, in appealing to people's morality, may be more effective in bringing about change than facts, which have so far failed to do so; laments that encyclical is unlikely to move American politicians. MORE

Jun. 17, 2015

Pope Francis' anticipated encyclical on global warming is likely to put pressure on several Catholic Republican presidential candidates who have expressed skepticism that human activity is driving climate change; many Catholic clergy members across United States are promoting Francis' message, inviting response from Catholic candidates Jeb Bush, Marco Rubio, Rick Santorum, Bobby Jindal and Chris Christie. MORE

Jun. 17, 2015

The Upshot; Pew Research Center poll finds that Americans' concerns over global warming, which fell after financial crisis and Pres Obama's election, are rising. MORE

Jun. 16, 2015

Leaked draft of papal encyclical on environment has Pope Francis calling for swift action on climate change by people of all religions; includes references to scientific evidence and touches on familiar themes regarding inequality and anti-consumerism. MORE

Jun. 16, 2015

Profile of Dr Naomi Oreskes, who is becoming one of most influential people in climate science by using tools of historical scholarship to counter arguments of climate change deniers and wage battle many climatologists are reluctant to take on; Oreskes' approach involves drawing parallels between history of climate change denial and other incidents in which critics refuted scientific principals that were later accepted. MORE

Jun. 14, 2015

Pope Francis prepares to release his first major encyclical on theme of the environment and the poor, seeking to emphasize moral dimension of global warming and other issues that have largely been debated in secular context; message will be delivered to more than billion Catholics worldwide, and could put church at forefront of nascent coalition between religion and science. MORE

Jun. 14, 2015

Pope Francis is expected to release papal encyclical that will make case that climate change is increasing suffering of poor around world, but Catholic Church leaders are wary of message in United States, where topic of global warming is controversial; American Catholics are largely more conservative than Francis on number of issues. MORE

Jun. 11, 2015

Environmental Protection Agency will launch initiative to regulate greenhouse gas emissions from airplanes, but admits it will probably take years before strict standards are put in place; says airplane emissions add to global warming. MORE

Jun. 10, 2015

Federal court throws out Murray Energy v EPA lawsuit, which was brought by largest coal companies in nation and 14 coal-producing states against Obama administration over proposed rule to reduce greenhouse gas emissions from power plants; rules challenge is premature given that measure, part of Obama administration's broad climate change policies, has not gone into effect. MORE

Jun. 9, 2015

Study in journal Science concludes warming oceans may drive fish to flee waters near Equator for cooler oceans that require less oxygen. MORE

Jun. 7, 2015

Op-Ed article by science scholars Robert Kopp, Matthew Huber and Jonathan Buzan warns that deadly heat waves like current one in India, deadliest since at least 1998, will become increasingly common due to global warming; notes that heat waves become deadly when they combine heat and humidity; observes that reducing greenhouse gas emissions could curtail threat heat waves pose for future. MORE

Jun. 7, 2015

Editorial welcomes call from European oil companies BG Group, BP, Eni, Royal Dutch Shell, Statoil and Total for tax on carbon emissions; underscores many benefits of such a tax, for both business and the environment; urges world leaders gathering in Paris to discuss climate change agreement to aggressively pursue carbon tax policy. MORE

Jun. 6, 2015

Norway's $890 billion pension fund will sell off many of its investments in coal, making it largest institution to join growing movement to divest from some fossil fuel stocks; move is likely to add momentum to growing global phenomenon that, while having few economic implications for companies, is laying groundwork for cultural and political discussion around climate change and fossil fuels. MORE

Jun. 5, 2015

National Oceanic and Atmospheric Admin presents evidence refuting so called 'hiatus' or slowdown of global warming; findings will be published in journal Science. MORE

Jun. 3, 2015

Eduardo Porter Economic Scene column argues that quarter-century effort to get large polluting nations to voluntarily lower greenhouse gas emissions by necessary margins has failed; supports idea of international 'climate club,' in which member nations would impose uniform tariff 4 percent on imports from nonmember countries; says such an economic stick is likely to induce universal participation in effort to fight climate change. MORE

Jun. 3, 2015

Environmental Protection Agency prepares to report that greenhouse gas emissions from airplanes endanger human health because they significantly contribute to global warming; so-called 'endangerment finding' will prompt requirement under Clean Air Act for agency to issue new regulations, joining string of new rules that have become hallmark of Pres Obama's environmental legacy. MORE

Jun. 2, 2015

Dr Joseph Shea study in journal The Cryosphere reports that Mt Everest region of Nepal could lose 70 percent of its glaciers by end of 21st century. MORE

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President Obama will unveil on Monday a set of environmental regulations devised to sharply cut planet-warming greenhouse gas emissions from the nation’s power plants and ultimately transform America’s electricity industry.

Promising more than a half-billion solar panels by the end of a first term and a target of clean energy for every home in a decade, Hillary Rodham Clinton unveiled goals on Sunday evening to reduce the threat of climate change.

Pope Francis is issuing an encyclical focusing on an issue of grand scope, the care of the planet. And though he sees the poor as most affected by the economic and political systems underlying the crisis, his 184-page document is an urgent call to action.